Answer:
C. 7
Step-by-step explanation:
4 * Sum (i = 1 to 3) (1/2)^(i - 1) =
= 4 * [(1/2)^0 + (1/2)^1 + (1/2)^2]
= 4 * [1 + 1/2 + 1/4]
= 4 * [7/4]
= 7
7
because I'm smart like that
